Value selection and entering means for calculating machines



July 17, 1962 H. GANG 3,044,697

VALUE SELECTION AND ENTERING MEANS FOR CALCULATING MACHINES Filed NOV.7, 1958 4 Sheets-Sheet 1 Q INVENTOR. 5051mm GANG H. GANG July 17, 1962VALUE SELECTION AND WTERING MEANS FOR CALCULATING MACHINES 4Sheets-Sheet 2 Filed Nov. "7, 1958 H. GANG 3,044,697 VALUE SELECTION ANDEXQTERING MEANS FOR CALCULATING MACHINES July 17, 1962 4 Sheets-Sheet 3Filed Nov. 7, 1958 INVENTOR. EM

H. GANG July 17, 1962 VALUE SELECTION AND ENTERING MEANS FUR GALCULATINGMACHINES 4 Sheets-Sheet 4 Filed Nov. 7, 1958 H INVEN TOR.

ERIKA!!! GANG United States Patent VALUE SELEtITlON AND ENTERING MEANSFUR CALCULATING MACHENES Herman Gang, Morris Plains, N.J., assignor toMonroe Calculating Machine Company, Orange, N.J., a corporation ofDelaware Filed'Nov. 7, 1958, Ser. No. 772,499

7 Claims. (61. 235-63) This invention relates to value entering meansfor tenkey type calculating machines wherein selective successivedepression of the 0 to 9 digital value keys is operable to entercorresponding values respectively into successive ordinal units of astorage device.

The most commonly known type of storage device for ten-key machinescomprises a selector carriage having ordinal rows of settable stop pins.Upon successive depression of the digital value keys, pins correspondingto the values of the depressed keys are set in the rows respectivelyfrom higher to lower orders. Subsequently the set pins are effective tocontrol excursions of actuator racks in a registering operation.

Another known type of storage device for ten-key machines includes anordinal series of storage gears mounted in a selector carriage. Thegears are successively set, from a home or zero position, to positionscorresponding respectively to the values of the successively depresseddigital value keys. Subsequently the gears are engaged by actuator racksand then zeroized to control excursions of the racks in a registeringoperation. Also the gears may be utilized as a multiplier storagemedium. in this instance, the set gears are successively counted back tozero, as is well known in the art, thereby determining the number oftimes a multiplicand will be added in the accumulator of the machine.

The value entering means of the present invention includes an ordinalseries of storage gears mounted in a selector carriage, as definedabove, with novel power operated means to set said gears.

It is accordingly a principal object of the invention to provideselection means for a ten-key type machine which is both rapid andpositive in operation.

Another object of the invention is to reduce the key pressure necessaryin the operation of the selection means.

Another object of the invention is toprovide means operable upon partialkey depression to complete an operation partially completed by thepartial key depression.

A further object of the invention is to achieve improved operatingcharacteristics of the selection means with relatively simple mechanismhaving a minimum number of parts.

Other objects and advantages of the invention will be evident from thefollowing description with reference to the accompanying drawings inwhich:

FIG. 1 is a plan view of the storage units and the means for enteringselected values therein.

FIG. 2 is a vertical section taken on the line 22 of FIG. 1.

FIG. 3 is a fragmentary perspective of the actuator gear drive andassociated selection mechanism.

FIG. 4 is a fragmentary perspective of the escapement mechanism for theselector carriage.

FIG. 5 is a fragmentary side elevation of the single cycle clutch foroperating the actuator gear drive and the escapement, and control meansfor the clutch.

FIG. 6 is a sectional view of the clutch taken on line 6-6 of FIG. 5.

Successive digits of a multidigit value are entered into the machine,highest order first, through a ten-key keyboard 1 (FIGS. 1, 2, 5). Thekeyboard includes ten keys numbered 10 through 19, shown in dot-dashlines (FIG. 1), for the digits 0 through 9 respectively.

The stems 2 of the keys are guided for vertical movement in pairs ofaligned slots in upper and lower keyboard plates 3 and 4 and areprovided with rack teeth at their forward edges. Four coil springs 5(FIG. 2) are threaded through intermediate framing plates of thekeyboard and are secured (not shown) at their opposite ends to the leftand right end plates 7 and 8 (FIG. 1). The springs 5 engage the lowerends of the key stems and normally resiliently bias the keys to raisedposition. One such spring is provided for the transversely elongatedzero key 10 and one for each of the horizontal rows of keys 11-13,14-16, and 17-19.

Disposed in spaced side-by-side relation beneath the digit keys 10through 19 are a like number of identical selector rack slides 20through 29 respectively associated therewith. The slides are supportedfor longitudinal movement on a pair of spaced rods 33 (FIGS. 2, 3) whichextend laterally through elongated slots 34 thereof and are providedwith rack teeth along their lower edges.

The rack teeth of each key stem 2 is meshed with a pinion 36. The ninepinions 36 of the digit keys 11 through 19 are mounted, in horizontalrows of three each, for independent rotation on respective shafts 40 andpinion 36 for zero key 10 is mounted for rotation on an individual shaft40. Each pinion 36 is of suflicient width to extend laterally into theplane of the associated selector slide where said pinion is engaged withthe rack teeth along the underedge of said slide. It will be noted thatpinions 36 of the middle row of keys 14, 15, and 16 (FIG. 1) whichengage the rack teeth of slides 24, 25, and 26 cross laterally underslides 27, 28, and 23' respectively. Accordingly these pinions 36 areprovided with circumferential grooves to permit free longitudinalmovement of these intervening slides 27, 28, and 23.

Elongated zero key 10 is provided at its left end portion with a secondstem 52 (FIG. 1) and meshing pinion 53. The latter is rigidly secured tothe active pinion 36 by a sleeve and the zero key is thereby accuratelyguided for vertical movement and any skewing tendency is avoided.

It will thus be seen from the foregoing that each digit key is indriving relation with its related selector slide and will, upon beingdepressed, be effective to drive the slide rearwardly from the normallydisabled position of FIGS. 1 and 2 to the enabled position shown in FIG.3. As will be described subsequently, the selector slide correspondingto any given value will be efiective when in enabled position to controlthe extent of rotation of a selector shaft 55 and thereby determine thevalue of the digit to be entered into storage gears of a selectorcarriage.

Selector shaft 55 extends transversely at the rear of selector slides2ti29 and is rotatably mounted in the machine framing. Fixed on shaft 55in longitudinal alignment with each selector slide is a collar 56 havinga radially extending stop lug 56a as best seen in FIGS. 1 and 3. Collars56 are arranged on shaft 55 so that lugs 56a are spaced angularly fromone another at distances relatively corresponding to the digitsrespectively represented by the associated selector slides.

Upon rearward movement of a selector slide 20-29, its rear end will bebrought from the ineffective position of FIGS. 1 and 2 to a positionimmediately adjacent the associated collar 36, as shown in FIG. 3, whereit is in the rotational path of clockwise movement of stop lug 56a onthe collar. If shaft 55 is then rotated clockwise, lug 56a will bebrought into engagement with the end of the selector slide therebyarresting rotation of said shaft after rotation from a normal positionthrough an angular distance corresponding to the digital value of saidslide. For

ace gee? example, if zero slide 2% is moved toward the rear, its rearend will be in position for immediate engagement by lug 56a. of theassociated collar 56 upon rotation of shaft 55. Therefore, substantiallyno rotational movement will be afforded shaft 55. iowever, if a slide21-2? is adjusted rearwardly the lug 56a of the associated collar 56will engage the adjusted slide after rotation of shaft 55 through anangular distance corresponding to the digital value of said slide.

A selector carriage designated generally by the numeral 57 (FIGS. 1, 2)is normally located to the right of the keyboard. The selector carriagecomprises a pair of end plates 58 which are slidably mounted on a pairof transversely extending shafts 59 and 69 supported in the machineframing.

Rotatably mounted on a shaft 61 in carriage 57 is an ordinal series ofstorage gears 62, and fixed for rotation with each gear 62 is a numeralwheel 63 to indicate the value set in the gear. Suitable detent means isadapted to hold each storage gear and wheel yieldably in set position.Such detent means comprises a pair of sprin urged balls 42 which engagean inner annulus of notches 43 in the wheel. Engaging storage gears 62are intermediate gears 64 rotatably mounted in carriage 57 on a shaftWhen carriage 57 is in normal rightmost position, the leftmostintermediate gear 64 is in the plane of a mutilated actuator gear 66, asshown in FIG. 1, which is fixed on selector shaft 55. Normally, however,the gears are not engaged (PEG. 2) because of the mutilation of gear 66.As carriage 57 is ordinally shifted toward the left, as later described,the successive lower order intermediate gears 6 are brought successivelyinto the plane of mutilated actuator gear as.

Means for controlling left shift of carriage 57 includes an escapementrack 67 (FIGS. 1, 2, 4). Rack 67 is mounted for transverse movement inthe machine framing and is biased leftwardly by a spring 63. The leftend plate '8 of carriage 57 is provided with a rearwardly extending lugwhich extends through a slot in rack 67. Therefore transverse movementof rack or is imparted to carriage 57.

A gear 69 engages teeth at the underside of rack 67 and is mounted on ashaft it? which is supported in the machine framing. Fixed for rotationwith gear 69 is a ratchet wheel 71. Ratchet wheel 71 is adapted forengagement with a pair of vertically disposed escapement fingers 72 and73. Fin ers 72, 73 are pivotally mounted at their lower ends onoppositely disposed arms of a rocker 74 which is controlled as laterdescribed, and are guided for vertical movement by suitable slots in aplate 49.

When rocker 74 is in normal counterclockwise position (FIGS. 2, 4),finger 72 will be raised into the path of movement of the teeth ofratchet wheel '71 and finger 73 will be lowered out of the path ofmovement. Finger 72, therefore, will restrain ratchet wheel 71 and gear69 from counterclockwise movement thereby restraining rack 67 andcarriage 57 against the urge of spring 68 from movement toward the left.

Upon clockwise movement of rocker 74, finger 72 will be lowered torelease ratchet wheel 71 and finger 73 will be raised into the path ofmovement of the teeth thereof. This will release carriage 57 forone-half step of ordinal movement toward the left. This one-half step ofmovement will bring an intermediate gear 64 from the plane of actuatorgear 66 and bring the neXt adjacent lower order gear 64 one-half step ofmovement toward the plane of actuator gear 66. When rocker 74 isrestored counterclockwise, finger 735 will release carriage 57 tocomplete its ordinal step of movement thereby bringing said next lowerorder intermediate gear 64 into the plane of actuator gear 66. It willthus be seen that the intermediate gears 64 will be brought successivelyfrom higher to lower orders into the plane of mutilated actuator gear66.

A single cycle clutch (F163. 1, 5, 6), designated generally by thenumeral 75 and which is controlled as described later, is adapted todrive selector shaft 55 and escapement fingers "1'2, 73 in timedrelation. Clutch 75 is of well-known construction wherein a toothedwheel 76 loosely mounted on a shaft 91 comprises the driving member ofthe clutch and is driven by a motor (not shown) through a suitable geartrain including a gear '77. The driven member of the clutch Comprises ahousing 78 which is keyed on shaft 911 which carries a spring urged pawl'79. Normally, pawl 79 is restrained from engagement with drive wheel 76by engagement with a detent St? which is mounted on a fixed pivot 81.Detent Stl has operating connection at the rear of a forwardly extendinglink 83. Link 32 is normally held toward the rear by a spring 5& and ismoved forwardly upon depression of any one of the digit keys lid-l9, aslater described, to control detent When link 82 is in normal rearwardposition, detent So will be rocked clockwise into the path of movementof pawl '79 thereby holding it from engagement with wheel 76 anddisengaging the clutch.

A single cycle lever 83 has common pivotal mounting at 81 with detentLever 83 is biased clockwise by spring connection 84 with an arm Za oflink 82.. However, when link 82 is in normal rear position the front endof a slot in arm 82;! will engage a pin in the lower arm of lever 83thereby holding said lever in counterclockwise position as shown in PEG.5 with the upper end of said lever out of the path of movement of pawl79.

Upon forward movement of link 32, detent 8t) will be movedcounterclockwise from engagement with pawl 79 to engage the clutch.During this operation, spring 84- will be effective to rock single cyclelever 83 clockwise. However, before appreciable clockwise movement oflever 83, an inclined edge '78:: of clutch housing 78 will engage theupper end of said lever thereby restraining it from such clockwisemovement. As clutch housing 78 rotates counterclockwise in the cycle ofoperation of the clutch, the upper end of lever 33 will ride on theouter peripheral edge of said housing.

Near the end of the cycle of operation of clutch 75, a cutout portion78b of clutch housing '78 will engage lever 83 which will therefore bereleased and moved clockwise by spring Thus lever will be moved intoposition to engage pawl 79 and disengage the clutch at the end of thesingle cycle of operation.

Upon release of the depressed digit key, link 82 will be restoredrearwardly by spring 5% and detent 8% will be moved clockwise to holdpawl 9 in clutch disengaging position while single cycle lever 83 willbe restored counterclockwise from engagement with said pawl. If thedepressed digit key is released before clutch 75 has completed itscycle, detent St? will ride on the periphery of clutch housing 78thereby preventing return movement of link 82 until cutout portion 78bpermits said detent to be restored clockwise to disengage the clutch atthe end of the cycle. As later described, link 32 when held in forwardposition, is effective to lock down a depressed 19-19 digit key therebyholding the parts operated by said key in adjusted position untilcompletion of the operations performed by the clutch.

The driving means for selector shaft 55 comprises an eccentric 73cintegral with clutch housing '73. Eccentric 78c operates an upwardlyextending strap 36. Strap 86 has pivotal connection at its upper endwith a rightwardly extending arm of a lever o7. A segmental rack 88 hascommon pivotal mounting with lever 87. A spring 89 extends between aleftwardly extending arm of lever 87 and rack thereby normally holdingsaid rack counterclockwise and into engagement with a limit pin 87a insaid lever. Rack engages a pinion 9t fixed at the right end of selectorshaft 55.

Normally eccentric 78c holds strap in lowermost position. Therefore,lever 87 and rack 33 will be held in clockwise position as shown in MG.5. During the first 180 of operation of clutch 75, eccentric 780 will beeffective to raise strap 86 thereby rocking lever 87 and rack 88counterclockwise. Counterclockwise rotation of rack 68 will rotatepinion 9'9 clockwise and likewise rotate selector shaft 55. During thisrotation of shaft 55, a stop lug 5601 will be rotated into engagementwith a set selector slide 26-29 as later described. Shaft 55, pinion 90and segment 88 therefore will be arrested from further rotation.

The upward movement of strap 86 by eccentric 780 will be operable torock lever 87 a distance greater than that required to impart maximumrotation to selector shaft 55, i.e., the distance required to engage theassociated lug 56a with digit 9 slide 29. It has been found that between150 and 170 of a cycle of clutch 75 may be utilized to impart thismaximum rotation to the selector shaft. Consequently, upon engagement ofa stop lug 56a with a selector slide, the resilient connectioncomprising spring 89 will yield as rack segment 88 18 arrested fromfurther rotation. Lever 87 therefore will be rocked idly furthercounterclockwise as the clutch completes its first half cycle ofoperation. During this first half cycle of operation of clutch 75,rotation of se lector shaft 55 will be operable to set a valuecorresponding to the value of a depressed digit key into one of thestorage gears 62 as later described. During the last half cycle ofclutch 75 eccentric 780 will be operable to restore the parts therebyrotating selector shaft 55 counterclockwise to normal position.

A cam 93 (FIGS. 2, 4) is effective to operate the escapement comprisingfingers 72, 73. Cam 93 is fast on shaft 91 which is driven by clutchhousing 78. The lower part of cam 93 normally engages rocker 74 which isurged counterclockwise by a spring 95. Counterclockwise rotation of cam93 will first be effective to em gage its high portion with rocker 74thereby rocking said rocker clockwise to lower finger 72 and raisefinger 73. This will permit one-half ordinal step of movement ofcarriage 57 to the left as heretofore described. Upon completion of thecycle of operation of clutch 75, the low portion of cam 93 will againengage rocker 74 thereby permitting the parts to be restored andpermitting carriage 57 to complete its ordinal step of movement. Timingof the operation of the escapement with respect to the operation ofselector shaft 55 will be described later.

As described before, depression of a digit key -19 will be effective tomove the associated slide -29 toward the rear and into the path ofmovement of stop lug 56a of the associated collar 56. In FIG. 3 of thedrawing, digit key 16 (digit 6) is shown depressed thereby movingselector slide 26 toward the rear. Movement of any one of the selectorslides is adapted to engage clutch 75. Furthermore, means is operableduring operation of clutch 75 to latch the operated selector slide inrearward effective position.

To effect engagement of clutch 75, a bail 96 (FIGS. 1, 3) is common toall of the selector slides. Bail 96 extends transversely above selectorslides 20-29 and is engaged by a rearwardly facing shoulder of eachslide. Bail 96 is fixed on a rock shaft 97 which extends transverselybelow the selector slides. Shaft 97 extends toward the right from bail96 and adjacent its right end has fixed thereon a depending crank arm 98(FIGS. 1, 5) which has pivotal connection at the front end of link 82.Upon movement of any one of the selector slides 20-29 toward the rear,its shoulder will be effective to rock bail 96, shaft 97 and crank 98clockwise. Clockwise movement of crank 98 will move arm 82 forwardlythereby engaging clutch 75 as heretofore described. A switch (not shown)for the motor which drives clutch 75 may be closed upon clockwisemovement of crank 98 or the motor may be continuously operable.

Means is provided to hold arm 82 toward the front of the machine duringoperation of clutch 75 thereby holding bail 96 in rocked clockwiseposition. To effect this holding operation, the inclined edge 78a (FIG.5) of clutch housing 78 will engage detent 80 thereby rocking itslightly further counterclockwise for engagement with the outer edge ofsaid housing. Arm 82 therefore will be held forwardly until near thecompletion of the clutch cycle when the recessed portion 78b of thehousing will engage detent 80.

The means to latch each slide 20-29 in rearwardly adjusted positionduring the cycle of clutch 75 comprises a latch lever 99 (FIGS. 2, 3)intermediately pivoted on the right side wall of each of said slides.Adjacent the front of each latch lever 99 is a cam slot 9911 Which isengaged by the front supporting shaft 33.

When a selector slide is in normal forward position (FIG. 2), shaft 33will engage the rearward end of cam slot 99a of its latch 99. This willhold the latch in clockwise position to disengage a latch shoulder atits rear end from bail 96. However, upon rearward movement of a selectorslide 26-29 and attendant clockwise movement of bail 96, the front endof cam slot 99a will be moved into engagement with shaft 33. This willbe effective to rock latch 99 counterclockwise from the ineffectiveposition of FIG. 2 to the effective position of FIG. 3 wherein itsshoulder is raised to engage bail 96. Thus it will be seen that theselector slide will be latched in rearward effective position as long asbail 96 is held in clockwise position.

Through inadvertence, an operator may depress a key 10-19 to anincompletely operated position wherein detent 80 will be rockedcounterclockwise from engagement with pawl 79 to engage clutch 75, butwherein the associated slide 20-29 will not be moved to its rearmostposition into the path of movement of a lug 56a. In such an instance,inclined edge 78a of clutch housing 78 will engage and rock detent 80further counterclockwise until it is engaged by the peripheral edge ofthe housing as previously described. This will move link 82 furtherforward thereby further rocking shaft 97 and bail 96. Latch 99 of theoperated slide 20-29 will, at this time, be engaged with ball 96.Therefore the associated slide 20-29 will be moved to its rearmostposition and the key 10-19 entrained therewith will be moved to fullydepressed position.

From an inspection of FIG. 2 it will be seen that mutilated actuatorgear 66 is several degrees counterclockwise from engagement with theintermediate gear 64 with which it is aligned. It will be noted thatmutilated gear 66 comprises nine teeth; therefore, the gear will beeffective to rotate intermediate gear 64 and the associated storage gear62 from one to nine steps of movement corresponding respectively to thedigits 1-9.

During approximately the first to 170 of operation of clutch 75, theheretofore described drive means for shaft 55 will be operable to rotateactuator gear 66 clockwise until arrested by engagement of a stop lug56a with a selector slide. A value corresponding to a depressed digitkey lif -l9 therefore will be entered into storage gear 62. During theremainder of the half cycle of operation of clutch 75, selector shaft 55and actuator gear 66 will be held in arrested position and cam 93 (FIGS.2, 4) will be effective to operate the escapement comprising fingers'72, 73 to permit one-half step of movement of carriage 57 toward theleft. This half step of movement will disengage intermediate gear 64from engagement with actuator gear 66 and position the next lowerintermediate gear 64 one-half step of movement from the plane ofactuator gear 66. Actuator gear 66 therefore will lie between anadjacent pair of intermediate gears and may be restored counterclockwiseto normal without interference.

During approximately of the last half cycle of operation of clutch 75,shaft 55 and actuator gear 66 will be fully restored counterclockwise.This will bring the mutilated portion of the actuator gear intotransverse alignment with intermediate gears 64. Therefore, carriage 57may be afforded the second step of movement to complete the ordinalshift of operation to bring the next lower order intermediate gear intothe plane of actuator gear 66. Consequently, as clutch 75 completes itscycle of operation, the escapement will be operated to permit carriage57 to complete its ordinal step of movement.

Upon completion of the operation of clutch 75, bail 96 and an operatedselector slide Zti-29 will be restored if a depressed digit key Iii-19has been released prior to completion of the clutch cycle.Alternatively, upon release of the depressed ke, the parts will berestored. Thus it will be seen that in response to successive depressionof digit keys M3 19, values corresponding to the depressed keys will beset in the successive order storage gears 62 from higher to lowerorders.

As heretofore described, the storage gears 62 may be zeroized therebycontrolling the excursions of actuator racks (not shown) to entercorresponding values into an accumulator of the machine. Such operationis fully disclosed in US. Patent No. 1,832,791 and in Swedish Patent No.61,735 issued to K. V. Rudin. At the conclusion of the registeringoperation during which storage gears 62 are zeroized, carriage 57 may berestored as disclosed in the above said patents or in any manner wellknown in connection with pin carriage return means in the ten keylisting machine art. As carriage 57 is restored, ratchet wheel '71(FIGS. 2, 4) will be rotated clockwise and its teeth will rack idly overyieldable escapement fingers 72, 73.

it may occur to one skilled in the art that storage gears 62 could benon-shiftable in the machine framing and actuator gear 66 could beshiftable with respect thereto on drive shaft 55 without departing fromthe principles of operation of the invention. in such instance, actuatorgear 66 would be splined for shifting movement on shaft 55. Actuatorgear 66 would be shifted to the rig t for engagement with the successivelower order intermediate gears 64. The timing of the shifting operationswith respect to rotation of actuator gear 66 would be identical to thetiming described in connection with shifting of selector carriage '7with respect to said actuator gear.

Although the storage devices of the present invention have beendescribed as operable to control a registering operation, it will beobvious that storage gears 62 and associated numeral wheels 63 may beutilized as registering devices per se. it will be understood thereforethat the invention resides in the means whereby values are entered intothe storage devices in response to suecessive depression of the digitalvalue keys and not in the utility of said storage devices. The inventiontherefore is to be limited only as necessitated by the spirit and scopeof the appended claims.

I claim:

1. In a calculating machine; a shiftable carriage, an ordinal series ofdigital Value storage gears in said carriage, a rotatably mounted shaft,an actuator gear on said shaft, shift means for ordinally shifting saidcarriage to bring said storage gears successively into position to bedriven by said actuator gear, a plurality of stop lugs differentiallypositioned in angular relationship along said shaft, a plurality ofslides each having a stop end, said slides being settable to bring theirstop ends respectively into the path of rotation of said stop lugs, aten: key keyboard, and means operable in response to depression of eachof said keys to set a respective one of said slides, to effect rotationof said shaft and to effect one ordinal shift operation of said shiftmeans.

2. In a calculating machine; a shiftable carriage, an ordinal series ofdigital value storage gears in said carriage, a rotatably mounted shaft,an actuator gear on said shaft, a plurality of stop lugs differentiallypositioned in angular relationship along said shaft, means for yieldablydriving said shaft in one direction and positively in the oppositedirection, shift means for ordinally ages? shifting said carriage tobring said storage gears successively into position to be driven by saidactuator gear, a plurality of stops respectively settable into the pathof rotation of said step lugs, a ten-key keyboard, and meanssequentially operable in response to depression of each of said keys toset a respective one of said stops, to effect operation of said drivemeans in said one direction, to effect a first half step ordinal shiftoperation of said shift means, to effect operation of said drive meansin said opposite direction and to effect a second half step ordinalshift operation of said shift means.

3. In a calculating machine; a shiftable carriage, an ordinal series ofdigital value storage gears in said carriage, a rotatably mounted shaft,an actuator gear on said shaft, means for ordinally shifting saidcarriage to bri g said storage gears successively into position to be"rear by said actuator gear, means for rotating said shaft when each ofsaid storage gears is in position to be driven by said actuator gear, aplurality of stop lugs differentially positioned in angular relationshipalong said shaft, a plurality of rack slides each settable to position astop end thereof into the path of rotation of a respective one of saidstop lugs, and means for setting each of said rack slides comprising apinion engaging said rack slide and a key having a stem with teethengaging said pinion.

4. The invention according to claim 3; including a bail rocked uponsetting of any one of said rack slides, and control means operable inresponse to rocking of said bail to control said means for rotating saidshaft and said means for shifting said carriage.

5. The invention according to claim 4; said control means including aclutch engaged upon rocking of said bail.

6. In a calculating machine; a shiftable carriage, an ordinal series ofdigital value storage gears in said carriage, a rotatably mounted shaft,an actuator gear on said shaft, a plurality of stop lugs differentiallypositioned in angular relationship along said shaft, a yieldable drivetrain for said shaft, shift means for ordinally shifting said carriageto bring said storage gears successively into position to be driven bysaid actuator gear, a plurality of stops respectively settable into thepath of rotation of said stop lugs, a cyclically operable clutch, meansoperable by said clutch to operate said drive train for said shaft andto effect one ordinal shift operation of said shift means, a ten-keykeyboard, means operable by depression of each of said keys to move arespective one of said stops toward set position, a transmission trainoperable by depression of any one of said keys to engage said clutchduring movement of the associated stop toward set position, and meansoperable by said clutch including said transmission train for completingthe movement of said associated stop to set position.

7. In a calculating machine; a shiftable carriage, an ordinal series ofdigital value storage gears in said carriage, a rotatably mounted shaft,an actuator gear on said shaft, a plurality of stop lugs difierentiallypositioned in angular relationship along said shaft, a yieldable drivetrain for said shaft, shift means for ordinally shifting said carriageto bring said storage gears successively into position to be driven bysaid actuator gear, a pluraiity of stops respectively settable into thepath of rotation of said step lugs, a cyclically operable clutch, meansoperable by said clutch to operate said drive train for said shaft andto effect one ordinal shift operation of said shift means, a ten-keykeyboard, means operable by depression of each of said keys to set arespective one of said stops, a transmission train operable upon partialdepression of any one of said keys to engage said clutch, and meansoperable by said clutch including said transmission train for furtherdepressing a partial depressed one of said keys.

(References on following page) References Cited in the file of thispatent UNITED STATES PATENTS Shiek Apr. 10, 1906 10 Mays Mar. 18, 1919Hamann Mar. 3, 1925 Fuller Nov. 5, 1935 Hopkins et a1 June 22, 1954Stansell Dec. 15, 1959 Heinze et a1. July 19, 1960

